Sandpapering-machine.



PATBNTED SEPT. 29, 1903 mhnmea.

J. A. FISHER. SANDPAPERING MACHINE.

APPLIUATIOI? FILED MAR. 26, 1902.

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' No. 740,263. PATENTED SEPT- 29, I903.

' J. A. FISHER.

SANDPAPERING MACHINE.

APPLICATION FILED MAR. 26. 1902.

4 SHEETS-SHEET 2 N0 MODEL.

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PATENT Patented September 29, 1967? Qrnqe? user? A. risnnn, F cnionemitninois.

SANDPAPERlN'G-MACHINE.

SPECIFICATION forming art of Letters latent No. 740,263, dated September 29, 1903. Application filed March 26; 1902. Serial No- IOOJZQ. (Ho model.)

To will whom it may concern.-

Be it known that 1, Jason A. FISHER, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Inn provements in Sandpapering-Maehines; and I do hereby declare the following to be a full, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to a sandpapering-- machine for operating on ogee, bent, and circular work, and flat, rounded, and irregular surfaces generally, and has for its object to provide a machine of this character that will greatly facilitate this class of work, as will be hereinafter set forth in detail.

In the drawings, Figure 1 is a side elevation of a machine embodying the improved features. Fig. 2 is a plan. Fig. 3 is a vertical section and part elevation on line 3, Fig. l. Fig. 4 is a plan detail. Fig. 5 is a hori- Zontal section on line 5, Fig. 1, looking in the direction indicated by the arrow. Fig. 6 is an end elevation and part section on line 6, Fig. 1. Fig. 7 is an elevation and part sec- 1. Fig. 8 is a detail plan on line 8, Fig. 6. Fig. 9 is a detail section on line 9, Fig. 6.

A represents the difierent partsof the main supporting-frame, which may be of any desired design best adapted for mounting the working parts.

The driving-shaft'll isprovided with suitable journal-bearings in the top part of the machine-frame and has a sandpaper-holding disk 12 rigidly mounted on one end thereof and revoluble therewith. This disk, Fig. 5, is formed with a solid face-plate 13, which is provided with the annular beveled edge 14:, on which the" annular edge of the sheet of sandpaper 15 bears, when secured in place. The periphery of the disk from the beveled edge backward is screw-threaded, as at a. A clamping-ring 16 is correspondingly threaded around its inner circumferential surface, as at b, and is adapted to engagement with the disk 12 in clamping an abrading-surface flat against the face-plate, as shown in Fig. 5. This ring is'provided 'ith the overhanging rim or flange 17, which has the beveled surface 18, corresponding to have a screw-threaded the beveled surface 14 of the disk, and catches the edge of a sheet of sandpaper or other abrading substance between the beveled surfaces as they come together and se cures the same in its working position. As the clamping-ring is screwed into place the beveled surfaces provide for a drawing action, which draws the paper equally all around from the center to the circuinference, so that by the time it is firmly clamped in place the working face of the disk presents a perfectly fiat and smooth abrading-surface.

A lining-pad d, of rubber, leather, or other suitable material, may be inserted between the face-plate'and the sandpaper, as certain kinds of work are facilitated by a cushionbacking of this character. This arrangement provides an efficient means whereby the wornout paper may be removed and replaced by a new sheet and the use of objectionable adhesive compositions entirely dispensed with.

This device is in the nature of a doubleended machine, each end being provided with. an adjustable table and intended to handle work of different contours.

The work-table 19 has a vertical, an endwise, and an angular adjustment, and the mechanism employed by which the different adjustments are eifected will be next described.

The table 19 is provided longitudinally on the under side, Figs. 6, 7, and 8, with V- shaped ribs 20 and 21, spaced apart and which seat loosely into correspondingly- 22 and'23. These trackrails are connected by a transverse bar 24, having a stem 25, Fig. 8, running parallel with the rails and which is provided longitudinally with a slot 26. A bolt .27 is secured to the under side of the table, the reduced threaded end thereof extending down through slot 26 for the engagement of a clamping wing-nut 28. By this means provision is made for the longitudinal adjustment of the table, as by slacking up on nut 28 the table grooved track-rails may be moved nearer to or farther away from the abrading-disk, as maybe necessary.

One end of a supporting-bracket 29 is bolted to a convenient part of the machine-frame andis provided on the other end with a rabbeted guide 30, Figs. 1, 6, and 9, in which is inserted a slide-block 31, adapted to have a it is lowered.

vertical adjustment by means of a handscrew 32. The yoke-arms 33 branch upwardly from opposite sides of the slide 31 and are connected to lugs 34, formed on the trackrails, by pivot-bolts 35. This provides for an up-and-down adjustmentof the table and also provides for the necessary pivotal movement in adjusting the table to any desired inclined angle above or below its horizontal position, as indicated by the dotted lines in Fig. 1.

A worm-shaft 36, Figs. 1 and 7, is journaled in a standard 37 and is manually rotated by a hand-wheel 38. A gear-wheel 39 is mounted on a shaft 40, also journaled in the standard 37, and engages the worm-shaft. The inner ends of the curved companion arms 41 and 42, Figs. 1, 2, and 7, are rigidly mounted on shaft 40 and are set the same distance apart as the track-rails. The outer part of these arms bears against the under side of the track-rails and supports the outer end of the table in any position to which it can be adjusted. By rotating the worm-shaft 36 in one direction the outer end of the table may be raised, and in the opposite direction This end of the machine is mostly intended for operating on the outside surfaces of circular work, as indicated by the dotted circle in Fig. 2. In providing means for centering and holding this class of work the table 19 is provided with an inverted-T slot 43, which starts from the inner end of the table and stops short of the outer end, Figs. 2 and 7. A nut 44, Fig. 6, is looselyinserted in the wide bottom of the slot 43. The lower end of a pin 45 has a threaded engagement with not 44 and extends above the surface of the table. The upper end of thispin is provided with a slot 46 for the engagement of a suitable device for manipulating the same in adjusting the pin and nut to difierent positions, according to the character of the work. By loosening up on the pin it may be moved, together with the nut, to any position within the range of the slot and then clamped in place by tightening up on the pin.

At the opposite end of the machine a sand-' papering-drum 47 is mounted on the upper end of a vertical shaft or spindle 48. This drum is provided in one side with a vertical dovetail groove or recess 49, Fig. 5, which runs the whole length of the drum. In securing the sheet of sandpaper 5O tightly in place on the drum the edges of the paper are turned inwardly against the side walls of the groove 49, and a close-fitting dovetail wedge 51 is driven in endwise, thus securing the paper in its working position without the use of an adhesive composition.

. The inner ends of the companion brackets 52 and 53, Figs. 1, 2, and 5, are secured to the frame. The inner end of work-table 54 is pivoted to the outer ends of brackets 52 and 53, as at 55, and provides for a tilting angle adjustment like that of the table at the opposite end of the machine, the mechanism employed to effect the angle adjustment being practically the same, and consists of a worm-shaft 56 journaled in a bracket 57, supported from the frame. A gear-wheel 58 is mounted on a shaft 59, journaled in a bifurcated bracket 60. The lower ends of the companion arms 61 (but one is shown) are rigidly mounted on shaft 59. The upper curved ends of these arms bearagainst and form a rest for the outer end of the work-table 54. By means of the hand-wheel 63 the Worm-shaft 56 may be rotated in either direction and the outer end of the work-table raised or lowered in setting the same at the desired angle. This table is provided with two slots 64 and 65, like the slot in the table at the opposite end of the machine. A pin 66 and a nut 67, Fig. 2, are placed in each of these slots and may be moved independentlyof each other in either direction longitudinally in adjusting them to different positions as a guide or rest for the work, in accordance with the shape and dimensions thereof.

A piece of work having contrasting or opposing curves is indicated by dotted lines as being in position to be operated upon. The vertical shaft 48, having journal-bearings 68 and 69, has both a rotary and an up-anddown movement. A pulley 70 is mounted on the lower end of this vertical shaft and is provided with a flange 71. A counter-shaft 72 is. journaled in the lower part of the machine-frame at the back side. A pulley 73, mounted on this counter-shaft, belts with a clutch-pulley 74, mounted on the machine driving-shaft, by which means a rotary motion is transmitted to the counter-shaft. A pulley 75 is mounted on one end of the counter-shaft and will have a crossed-belt connection with pulley 70 and a rotary motion thereby imparted to the vertical shaft.

A stationary base-plate 76, Figs. 1, 3, and 4, is located under the vertical shaft 48 and has companion bearing-standards 77 formed thereon, and in which is journaled a stubshaft 78, having a worm gear-wheel 79 mount ed on the inner end thereof, and which engages a worm-shaft 80, journaled in bearinglugs 81 on the base 76. A grooved pulley 82 is mounted on one end of worm-shaft 80, and a companion pulley 83 is mounted on the counter-shaft 72 in line with pulley 83, and which will have a belt'connectionin impart ing a rotary motion to worm-shaft 80, and that in turn imparting a rotary action to stub-shaft 78. A cam-wheel 84 is mounted on shaft 78 and bears against the under side of the flange 71, formed on the lower end of pulley 70, mounted on the vertical shaft 48. This cam-wheel supports the vertical shaft and, together with the force of gravity, imparts the required vertical reciprocating movement thereto in bringing the entire abrading-surface of the sandpaper-drum into position for use, so that the same may be uniformly worn away.

A rotary motion is transmitted to the ma ICC chine driving-shaft by means of a drivingpulley 85 mounted thereon, and which will be belted with the source of power.

When the abrading-disk at the right-hand end of the machine is to be operated, the clutch member 86 is thrown into frictional contact with the driving-pulley 85 by means of a hand-lever 87. Motion is transmitted to the vertical shaft by throwing the clutch member 88, forming an integral part of clutch-- pulley 74, into engagement with driving-pulley 85. The clutch member 88 is thrown into and out of engagement by a hand-lever 89. This clutch motion-transmitting mechanism is of the usual character, and a detailed description of the same will therefore be omitted.

The securing of sandpaper to a supportingbody with glue or other adhesive composition is objectionable and inconvenient. It is a somewhat difficult matter to mount the paper evenly and smoothly, so as to present a flat abrading-surface. The paper must be allowed to dry, thus losing valuable time, and then, again, the worn-out remaining paper is difficult to remove from its mounting. The means herein set forth obviates these objectionable features and saves timeand labor.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a machine of the class described, the combination with a revoluble abrading-disk, of a work-table adapted to have an endwise, a vertical and an angular adjustment in bringin g the work properly into position to be acted upon by said disk, and means for effecting the different adj ustme'nts, substantially as set forth.

2. In a machine of the class described, the combination with a revoluble abrading-disk, of a work-table mountedin front of said disk, the companion ribs mounted on the under side of said table, the track-rails with which said ribs engage, a transverse bar-provided with a slotted stem and connecting the track-rails, a bolt secured to the under side of the work table and having a threaded end extending downwardly through the slot in said stem, and a clamping-nut engaging said bolt, whereby said table may be moved horizontally and locked in place in bringing the work in position to be operated upon, substantially as set forth. i

3. In a machine of the class described, the combination with a work-table, of a supportlug-bracket provided with a rabbeted guide, a slide-block having a vertical movement in said guide and provided with yoke-arms extending upwardly from opposite sides thereof, the track-rails to which the yoke-arms are pivoted, and means for imparting a vertical movement to said slide-block, substantially as set forth.

4:. In a machine of the class described, the combination with a revoluble abrading-disk, of a work-holding table, the movable curved companion arms having their free upper ends contacting the under side of said table, a revoluble shaft on which the lower ends of said arms are mounted, and means for rotating said shaft in imparting motion to the curved arms in bringing the work-table in different inclined positions, substantially as set forth.

' 5. In a machine of the class described, the combination with a work-table, of the companion arms having the free curved upper ends thereof bearing against the under side of said table, a worm-shaft, a revoluble shaft, a gear-wheel mounted thereon and engaging said worm-shaft, and means for rotating the worm-shaft in adjusting the work-table to any desired inclined position, substantially as set forth.

6. In a machine of the class described, the

combination with a revoluble abrading-disk, of a work-table provided with a T- shaped groove starting from the inner end, of a nut movablyinserted in said groove, and a work- -holding pin, having its lower end fixed in said In testimony whereof I affix my signature in presence of two witnesses.

JA$ON A. FISHER.

Vvitnesses: I

L. M. FREEMAN, L. B. OOUPLAND. 

